
153
© 2007 Schneider Electric. All Rights Reserved.
63230-216-229-B1
A
Appendix
Ground Fault Current Measuring
4-Wire Power System
Method
Number
Measurement
Method
Measurement
Rangs
Setting Range Core Bal.
CT
Connections IN (Source)
Setting
Rating
(I
Nr)
2B Ext. sum of 4
Std. 1A or 5A
CT w/CCA634
conn.
0.01 to 40 I
Nr
(min. 100 mA)
DT=0.01 to 15 INr
IDMT=0.01 to 1.0
I
Nr
none "5A CT [or 1A]
(CSH30/
CCA634)"
I
N Phase
CTs
3B Std. 1A or 5A
Zero Sequence
CT w/CCA634
conn.
0.01 to 20 I
Nr
(min. 100 mA)
DT=0.01 to 15 INr
IDMT=0.01 to 1.0
I
Nr
Std. 1A "5A CT [or 1A]
(CSH30/
CCA634)"
I
Nr Core
Bal. CT
4B Std. 1A or 5A
Zero Sequence
CT w/CSH30
Aux CT
0.01 to 20 I
Nr
(min. 100 mA)
DT=0.01 to 15 INr
IDMT=0.01 to 1.0
I
Nr
Std. 1A or
5A Core
Bal. CT
+CSH30
"5A CT [or 1A]
(CSH30/
CCA634)"
I
Nr Core
Bal. CT
5B Ext. sum of 4
Std. 1A or 5A
CT w/CSH30
Aux CT
0.01 to 40 I
Nr
(min. 100 mA)
DT=0.01 to 15 INr
IDMT=0.01 to 1.0
I
Nr
CSH 30 "5A CT [or 1A]
(CSH30/
CCA634)"
I
N Phase
CTs
6B* Specific CSH
Zero Sequence
CT on 2A Input
Rating
0.1 to 40A DT=0.1 to 30A
IDMT=0.1 to 2A
CSH120
CSH 200
"CSH120/200
2A rating"
2A
7B
(Sensitiv
e)
Specific CSH
Zero Sequence
CT on 20A Input
Rating
0.2 to 400A DT=0.2 to 300A
IDMT=0.2 to 20A
CSH120
CSH200
"CSH120/200
20A rating"
20A
8B High Ratio 1A
or 5A Zero
Sequence CT
w/ACE990 Aux
CT
0.1 to 20 I
Nr DT=0.01 to 15 INr
IDMT=0.01 to 1.0
I
Nr
High
Ratio 1A
or 5A
Core Bal.
CT
+ACE990
Aux CT
"ACE990
Range 1"
[k<0.05] or
"Range 2"
[k>0.l05]
k times
number of
turns zero
sequence
CT
** min setting =
100 mA except
for methods 6, 7
* orient supplied jumper for 4 pole shorting
c
b
a
CCA634
Sepam
7 (1A)
8 (5A)
B1 or B2
Ia
Ib
Ic
a b c n
* orient supplied jumper for 3 pole shorting
turns
turns
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